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The pronunciation of any word in English (or any language at all) is not Universal.  This is because there are many different dialects of The English Language — both throughout America, and also world-wide.  The pronunciations that are presented on GiveMeSomeEnglish!!! are based-upon a combination of both “common usage”, and the most neutral accent used in The International Common Tongue — a.k.a. “American English”.
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Absenteeism – For this word:  the “A” is short; the “b” is (almost) stopped;  for the “-ent” suffix – the “e” turns into an i-schwa, and the final “t” is (often) stopped (this is the standard pronunciation of this suffix in The Common Tongue);  the “ee” combination is pronounced simply like the single long letter “e” (this is the standard pronunciation of this letter combination in The Common Tongue);  there is a phantom consonant “Y” in-between the “ee” combination and the “i” (this is a product of the transition from one vowel sound to the next);  and for the “-ism” suffix – the “i” is an i-schwa, the “s” is pronounced (almost) like the letter “z”, and there is a phantom-schwa in-between the “s” and the “m” (this is a product of the transition from one sound to the next) – (this is the standard pronunciation of this suffix in The Common Tongue).

– /æb-sihn-TEE-yih-zəm/ – /æb.sə(ɪ)n.tiː.jə(ɪ).zəm/ – Notice also that the stress is on the third syllable –

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See Also:  Absence & Absent

Learn More About The Word “Absenteeism” On Wiktionary

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